exam Maths Puzzle Numerical Ability

How many cubes with a 2 cm edge can be packed in this box 10 cm length , 4 cm width, 6 cm height

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exam Other Question

Please help me on this question! Question: Convert each point to polar coordinates.The point is (2,-3). the human brain has 10 million nerve cells and the average cell has 200 billion molecules. What is the number of molecules in a nerve cell?

10cells = 200 billion molecules
?m=10 (200m)
? = 2000 billion

Thanks for your help!